Repairing Clairton, however, could be expensive, an investigation into the explosion could turn up more problems, and an ...

Allegheny County is increasing air quality monitoring after an explosion at a U.S. Steel plant south of Pittsburgh killed two ...

Workers were heating coal and preparing for routine maintenance when an explosion rocked a U.S. Steel plant outside ...

Preparations for a routine maintenance task may have led to an explosion at a U.S. Steel coal-processing plant near ...

An explosion at a steel plant in Pennsylvania on Monday has led to an extremely serious situation. The explosion at the plant ...

The company defended its safety record as Investigators worked to determine the cause of the blast.

Authorities said their investigation has shifted to the cause of the explosion after they accounted for everyone who was missing.

The mill, which is part of the recent merger between U.S. Steel and Nippon Steel, has faced scrutiny from federal and local ...